Solutions: MCQs | Question – Paper 5


Topic: Solutions, Test No.: 05, Total MCQs: 10

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Question 1
In the redox reaction,

2KMnO4 + 3H2SO4 + 5H2C2O4 K2SO4 + 2MnSO4 + 8H2O + 10CO2

the volume of 0.1M. KMnO4 required to Oxidize 25mL of 0.25 M. H2C2O4 solution is

A
25 L
B
125 mL
C
25 mL
D
1.25 L
Question 2
In an oxidation reduction reaction, MnO4 ion is converted to Mn2+. What is the number of equivalents of KMnO4 (mol. wt = 158) present in 250 ml of 0.04 M KMnO4 solution?
A
0.02
B
0.05
C
0.04
D
0.07
Question 3
What is the volume (in ml) of 0.1M potassium permanganate solution required to completely oxidize 100ml of 0.5M ferrous sulphate solution in acidic medium?
A
20
B
200
C
50
D
100
Question 4
35.4 mL of HCl is required for the neutralization of a solution containing 0.275 g of sodium hydroxide. The normality of hydrochloric acid is
A
0.194 N
B
0.142 N
C
0.97 N
D
0.244 N
Question 5
The volume of two HCl solutions A(0.5N) and B(0.1N) to be mixed for preparing 2l of 0.2 N HCl solution
A
0.5 l of A + 1.5 l of B
B
1.5 l of A + 0.5l of B
C
1 l of A + 1 l of B
D
0.75 l of A + 1.25 l of B
Question 6
A mixture of ethyl alcohol and propyl alcohol has vapour pressure of 290 mm at 300 K. The vapour pressure of propyl alcohol is 200 mm. If the mole fraction of ethyl alcohol is 0.6, its vapour pressure (in mm) at the same temperature will be
A
300
B
700
C
360
D
350
Question 7
Vapour pressure of pure ‘A’ is 70 mm of Hg at 25°C. It forms an ideal solution with ‘B’ in which mole fraction of A is 0.8. If the vapour pressure of the solution is 84 mm of Hg at 25°C, the vapour pressure of pure ‘B’ at 25°C is
A
56 m
B
70 mm
C
140 mm
D
28 mm
Question 8
A mixture of ethane and ethene occupies 41 L at 1 atm and 500 K. The mixture reacts completely with 10/3 mole of O2 to produce CO2 and H2O. The mole fractions of ethane and ethene in the mixture are (R = 0.082 L atm K–1 mol–1) respectively
A
0.50, 0.50
B
0.75, 0.25
C
0.67, 0.33
D
0.25, 0.75
Question 9
X is dissolved in water. Maximum boiling point is observed when X is ... (0.1 M each):
A
CaSO4
B
BaCl2
C
NaCl
D
urea
Question 10
The volume of 10N and 4N HCl required to make 1 litre of 7N HCl are
A
0.75 litre of 10N HCl and 0.25 litre of 4N HCl
B
0.80 litre of 10N HCl and 0.20 litre of 4N HCl
C
0.60 litre of 10N HCl and 0.40 litre of 4N HCl
D
0.50 litre of 10N HCl and 0.50 litre of 4N HCl
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